Improvement in filtering-cisterns



NITED STATES PATENT OFFICE.

PHILEMON MRKLEY, OF CANTON, ILLINOIS.

IMPROVEMENT IN FILTERING-CISTERNS.

Specification forming part of Letters Patent No. 41,850, dated Match 8,1864.

.T0 all whom it may concern:

Beit known that I, PHILEMON MARKLEY, of Canton, in the county of Fultonand State of Illinois, have invented a new and useful Improvement inFiltering-Cisterns; and I do hereby declare that the following is a fulland exact description thereof, reference being had to the accompanyingdrawing,'and to the letters and figures of reference thereon.

The nature of my invention consists in buildi ing the cistern proper,A,in the form of a hollow globe or sphere, with the water-chamber Bdirectly above the cistern, giving a large ltering-surface, and soarranging the waterchamber with the cistern that both shall rest uponthe same base best adapted to resist pressure from without, and thusprevent cracking from pressure or settling by weight.

To enable others skilled in the art to make such a cistern, I willproceed todescribe its construction and operation.

I construct my cistern by excavating a circular pit in the ground to thedepth desired for the p oint marked 3, from which half the globe will bebelow and half above that point when completed. With a revolving centerpost and radius, the attached end of the radi us at the point 3, Idetermine the outline of the hollow sphere necessary to form a perfecthalf-globe when the brick are laid upon the surface of the lowerexcavation. I build the. lower half of the globe an eight-inch brickwall, and from the height, equal to the center, (marked 3,) l build afour-inch perpendicular circular wall, resting on outer half of base,and as high as center, (marked 4,) and cement the perpendicularwall. Ithen build the upper half of the globe-cistern wall four inches inthickness and resting on inside half of basewall, laying in77 lead pipefor pump and leaving a circular opening at top sixteen inches indiameter; then cement the lower half only of the globel and lay a iiatstone in cement over the openin g. I then cover the upper Wall of globewith sand and put a layer of charcoal and of sand, as shown in drawing.Covering the sand with boards upon which to stand, I then lay the archedor vaulted roof- Wall over the waterchamber, leaving a circular openingat top of sixteen inches diameter, and build up a circular neck, asshown, and cement the inside of roof of water-chamber and neck. As thewalls are being built, I lay in the necessary pipes tor pump, inlet andoutlet.

The water from inlet-pipe is so directed as to strike the dat stone, andthen it lters through the twoinch layer of sand, through' four-inchlayer of charcoal, through the lower stratum of sand, and finallythrough brick forming upper half of globe-cistern wall.

What I claim as my invention, and desire to secure by Letters Patent,is-.- ,l

A iiltering-cistern in the form of a hollow globe, with the chamber forunfiltered Water directly above the cisteru, thereby giving a filteringsurface equal to the circumference of the water-chamber, with the waterchamber and cistern having a common base-to Wit, the lower half of aneightinch globe Wall.

PHILEMON MARKLEY.

Witnesses:

W. H. HAsKELL, DANIEL BULLARD.

